Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sebastian Alejandro Mejia, PA
Physician Assistant in Modesto, CA · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1245963545
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Registry record
Entity type Individual (Type 1)
Name Sebastian Alejandro Mejia
Credential PA
Sex Male
Practice address 1340 Mitchell Rd, Modesto, CA, 95351
Phone (209) 581-9711
Fax (209) 581-9703
Enumeration date Jul 5, 2022
Last updated in NPPES Sep 25, 2025
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 65083 (CA) Primary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA9119376 (FL) Secondary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Sebastian Mejia?
Sebastian Mejia is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-25.